Home / 20,447.77-28,231.91-15,659.26

Finding the Fourth Proportional to 20,447.77, 28,231.91 and 15,659.26

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Solution

The fourth proportional to 20,447.77, 28,231.91 and 15,659.26 is: 21,620.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,447.77 : 28,231.91 = 15,659.26 : x
  2. Step 2: Convert to fraction form
    20,447.77/28,231.91 = 15,659.26/x
  3. Step 3: Cross multiply
    20,447.77x = 28,231.91 × 15,659.26
  4. Step 4: Simplify right side
    20,447.77x = 442,090,806.65
  5. Step 5: Solve for x
    x = 442,090,806.65/20,447.77
  6. Step 6: Final answer
    x = 21,620.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.